Nut-lock



OBRIN E. G. OLMSTED, OF DENVER, CLOBIADO.

NUTJJOCK.

Application led July 29, 1920, Serial No. 399,780. Renewed April 12,1921.

To all whom t may concern.'

Be it known that l, OnnrN E. G. Omrs'rED, a citizen of the UnitedStates, residing at Denver, in the county of Denver and State ofColorado, have invented certain new and useful Improvements in Nut-Locks; and l do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to nut locks and more particularly to nut locksoperating through cooperation oi the nut with a coacting washer and aplate.

The object of the invention is to provide a simple and reliable deviceof the character indicated which may be applied and removed withoutspecial tools and which can be removed as simply and readily as applied.

rlhe invention consists in certain novel structures, arrangement andcombinations of parts as hereinafter more specifically described andclaimed.

One sheet of drawings accompanies this specification as part thereof inwhich like reference characters denote like parts throughout.

Figure l shows the device applied and with the locking tongue of thewasher in locked position,

Fig. 2 shows the device applied'with the locking tongue of the washer inunlocked position,

Fig. 8 shows side arid bottom views of the nut, and

Figs. 4, 5 and 6 arc plan views of suitable forms of washers.

Referring to the drawings, l represents an ordinary bolt and 2 2represent two plates which it is desired to secure together' by bolt 1.The nut 3 is provided in its bottom with a plurality of radial ratchetslots of two types. Slots 4 are, for example, as illustrated, twice thedepth of slots 5 and slots 5 alternate with slots 4.

The washer 6, of a thickness equal to the depth of slots 5, is slottedradially and one end bent up to form a llocking tongue 8 three times thethickness of the washer in length. The part of the washer 7 adjacent thelocking tongue 8 Jfor reasons hereinafter made clear, is of spring metaland may be advantageously made narrower as at 7 in Figs, 5 and 6 andigor economy of metal, lugs Specification o Letters Patent.

Patented May 24, 192i.

serial no. ecosse.

lO-ll may be stamped tor centering the washer on the bolt. .fr notch 9is cut in the plate adjacent the circumference of the nut and washer asshown in Figs. l and 2, this notch being cut with its bottom incliningupward in a. counterclock-wise direction for an ordinary right handthreaded bolt as illustrated.

To apply the bolt, the washer is slipped over the threaded end ot thebolt with the locking tongue up and the nut screwed down. TWhen the nutengages the tongue the washer turns until locking tongue 8 is above thenotch 9 in the plate. As the nut is screwed down "farther, the part- 7ot the washer is gradually depressed into notch 9 and when the nut istight will be almost against the inclined bottom of said notcn. li nowthe nut is iinally tightened to leave locking tongue 8 in engagementwith a shallow slot 5 reversal ot the nut 3 is impossible by reason 01"'the Jact that tongue 8 being three times the length oi the depth ot slot5, one-third of tongue 8 is below the surface of the plate 2 and cannotpossibly be elevated above it to unlock.

lllhen it is desired to unlock the bolt, it is only necessary to tightenthe nut a fraction of a turn and bring locking tongue 8 into engagementwith a deep slot 4. Upon then reversing the nut, spring part 7 of thewasher in engagement with the inclined bottom of notch 9 will forcelocking tongue 8 up into slot 4 the full depth, raising the bottom ointhe locking tongue clear of the top of plate 2 and permitting continuedrotation and removal of the nut.

What I claim is:

l. A nut lock comprising aplate having a bolt hole and a radial notchadjacent thereto, awasher slot-ted and having an upturned radial lockingtongue and a nut having` a plurality of radial ratchet slots on itslower tace, said slots being alternately and relativelyT deep andshallow, the locking tongue, notch in the plate and deep and shallowslots in the nut being so proportioned that when said tongue ispositioned between the notch and a shallow slot.v the nut will belocked, but when positioned between the notch and a deep slot the nutwill be unlocked.

9.. A nut lock comprising a plate having a bolt hole and a radial notchwith an inclined bottom adjacent thereto, a washer slotted and having aradial upturned locking tongue and a nut having a plurality of radialratchet slots on its lower tace, said slots being alternately andrelatively deep and shallow, the washer being of a thickness equal tothe depth of the shallow slots, the notch in the plate, and the deepslots being twice as deep as the shallow slots and the locking tonguethree times as long as the depth of the shallow slots.

3. ln adevice of the character mentioned, the combination of anon-rotary part, a rorber interposed between said parts adapted to locksaid rotary part when engaged with a shallow notch and not to interferewith the rotary part when engaged with a deep notch.

In testimony whereof I ailiX my signature.

oRniN n. e. onMsTED.V

